Aye-firmative. Muchas gracias. After I had posted that question I thought, "why would anyone attempt a Bisley conversion in grip only without the hammer swap?... That's not the way to do it." And you have reminded me of the hammer strut/spring geometry change. I should learn more about the gun, then I might peruse Brownell's pages. I have two Blackhawks inbound; a 1964 .44 Super for which I also have purchased a Hogue Monogrip set. I may instead simply install that for magnum work. The second Blackhawk is one of my grail guns: a 1967 4-5/8" .41 and I do not anticipate wanting anything other than a cosmetic stocks swap and reloading dies. Thank you again for your knowledgeable reply to my question.